这里是我的复合代码:
<cc:attribute name="step" type="Get.Model.Step"/>
<cc:attribute name="removeQuantityAction" />
[...]
<p:dataList id="quantities" value="#{cc.attrs.Quantities}" var="quantity" itemType="disc">
<com:Quantity removeQuantityAction="#{cc.attrs.removeQuantityAction(cc.attrs[step],quantity)}" />
</p:dataList>
我也试过这个:
removeQuantityAction="#cc.attrs.removeQuantityAction(cc.attrs.step,quantity)}"
但我确实得到了
/resources/Get.comp/Step.xhtml @ 51,156 removeQuantityAction =“#{cc.attrs.removeQuantityAction(cc.attrs.step,quantity)}”/ resourcessGet.comp/Step.xhtml @ 51,156 removeQuantityAction = “#{cc.attrs.removeQuantityAction(cc.attrs.step,quantity)}”非法尝试将参数传递给复合组件查找表达式(即cc.attrs。[identifier])。
方法本身如下:
public void removeQuantity(Step step, Quantity quantity) {}
我该如何解决这个问题?
答案 0 :(得分:1)
有可能将托管bean的引用和方法名称作为单独的参数传递:
父页:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:my="http://java.sun.com/jsf/composite/emcomp">
<h:head />
<h:body>
<h:form>
<my:myButton value="Send" methodName="send" beanRefer="#{bean}" />
</h:form>
</h:body>
</html>
<强>组合:强>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:composite="http://java.sun.com/jsf/composite"
xmlns:h="http://java.sun.com/jsf/html">
<h:body>
<composite:interface>
<composite:attribute name="value" required="true" />
<composite:attribute name="methodName" required="true" />
<composite:attribute name="beanRefer" required="true" />
</composite:interface>
<composite:implementation>
<h:commandButton value="#{cc.attrs.value}"
action="#{cc.attrs.beanRefer[cc.attrs.methodName]}" />
</composite:implementation>
</h:body>
</html>
@ManagedBean
@ViewScoped
public class Bean {
public void send() {
System.out.println("Sent!");
}
}
对于使用带有参数的参数,here you have @BalusC的一个很好的解释,这基本上意味着在方法调用中添加setPropertyActionListener
,因为你不能将动态方法引用与动态参数组合在一起:
<h:commandButton value="#{cc.attrs.value}"
action="#{cc.attrs.beanRefer[cc.attrs.methodName]}">
<f:setPropertyActionListener
target="#{cc.attrs.beanRefer[cc.attrs.targetProperty]}"
value="#{cc.attrs.methodArgument}" />
</h:commandButton>
private String targetProperty;
//Getter and setters
public void send() {
System.out.println("Sent " + targetProperty);
}